c++/6764: Throwing exception causes crash with '-O2 -fomit-frame-pointer'

[pavenis@latnet.lv]

>Number:         6764
>Category:       c++
>Synopsis:       Throwing exception causes crash with '-O2 -fomit-frame-pointer'
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed May 22 02:16:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Andris Pavenis
>Release:        gcc-3.1 release
>Organization:
>Environment:
targets i686-pc-linux-gnu and i586-pc-msdosdjgpp
>Description:
Throwing exception in attached test example causes 
SIGABRT if example is compiled with options '-O2 -fomit-frame-pointer'. There is no crash if example is compiled
without option -fomit-frame-pointer.

It's not a regression as gcc-2.95.3 have the same problem
>How-To-Repeat:
Compile attached example and run it:
  g++ -O2 -fomit-frame-pointer except.cc -o except
  ./except 
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
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Content-Disposition: attachment; filename="except.cc"

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